Personal Sky Charts: What Spatial Press Actually Makes
What a Spatial Press personal sky chart is, what inputs define it, and how the calculated sky becomes a print or digital object.
Spatial Press Journal
Guides, research, and provenance for reconstructing personal skies from time and place.
User Guide
ANGIE: The Sky-Chart Engine Behind Spatial Press
How ANGIE turns a date, time, and observer location into the geometry of a Spatial Press sky chart.
Star Map vs. Sky Chart: What the Terms Actually Mean
The practical difference between a decorative star map, a star chart, and a personal sky chart tied to an exact observer.
Is Spatial Press Astronomy or Astrology?
Where Spatial Press uses astronomical reconstruction and where symbolic or astrological interpretation is a separate layer.
From Personal Sky Chart to Custom Celestial Print
How one calculated Spatial Press render moves into posters, digital files, and other product formats without changing the underlying moment.
How to Research the Most Accurate Birth Data for a Sky Chart
A practical workflow for moving from a birth certificate to a historically defensible birthplace coordinate — even down to a maternity wing when the evidence survives.
Coordinates vs. Place Names: Why a Sky Chart Needs Both
Why latitude and longitude define the viewpoint while a place name preserves human context, timezone resolution, and provenance.
How Many Decimal Places Do Birth Coordinates Need?
What coordinate decimals mean in physical distance, and why extra digits should never imply evidence you do not have.
How to Check Whether a Personal Sky Chart Is Actually Personalized
A practical buyer’s test for whether a custom star map or sky chart really changes with date, time, and location.
How to Read a Spatial Press Sky Chart
A concise guide to the main spatial layers in a Spatial Press chart: observer, horizon, orientation, celestial bodies, labels, and provenance.
Astronomy
Why Exact Time and Place Matter in a Personal Sky Chart
How clock time, latitude, longitude, and observer position change the local sky shown in a personal chart.
Altitude and Azimuth: The Coordinates of the Sky You Actually See
A concise explanation of altitude, azimuth, the horizon, and why these coordinates depend on the observer.
Why Planets Move Differently From the Background Stars
Why solar-system bodies require time-dependent ephemerides while distant stars can often be treated differently over short human timescales.
Research
Time Zones, Local Clock Time, and Historical Sky Charts
Why a recorded local time is not yet an astronomical instant, and why historical timezone rules can be part of chart reconstruction.
Birth Certificates, Recorded Time, and What the Document Actually Proves
How to separate the facts written on a birth record from later assumptions about exact time, facility, and location.
Daylight Saving Time Can Change a Historical Birth-Sky Reconstruction
Why daylight-saving rules must be resolved for the exact place and date rather than assumed from today’s convention.
Civil Time Is Historical Data
Why clocks, time zones, daylight-saving rules, and local conventions belong in the source record when reconstructing historical skies.
JPL Horizons, Ephemerides, and the Observer in the Sky
What an ephemeris is, why observer location matters, and what NASA/JPL Horizons reveals about the geometry behind personal sky charts.
What a Star Catalog Actually Contains
A plain-language guide to stellar catalogs, astrometry, proper motion, parallax, brightness, uncertainty, and why catalog versioning matters.
Provenance
How to Research a Historic Hospital Location — Down to the Maternity Wing
A source hierarchy for reconstructing where a hospital actually stood, which building handled births, and how to avoid false precision.
How to Reconstruct a Historical Sky From Archival Records
A practical research method for turning diaries, certificates, newspapers, photographs, maps, and institutional records into chartable time and place evidence.
What Provenance Means for Computational Art
Why a computational image should preserve sources, inputs, transformations, and versioned rendering decisions instead of only the final pixels.
A Source Hierarchy for Historical Location Research
How to rank records when you are trying to identify a historical address, building footprint, campus, room, or other precise location.
Celestial Imagery, Public Data, and Commercial Licensing
Why a scientifically interesting planet image is not automatically cleared for a commercial product, and how Spatial Press thinks about source rights.
Case Study
From Portales to a Point: A Birthplace Provenance Case Study
How the Spatial Press sample chart moves from a city-level birth record toward a historically defensible hospital coordinate — while keeping the maternity ward unresolved.